Hybrid phase 1T/2H-MoS2 with controllable 1T concentration and its promoted hydrogen evolution reaction.,Nanoscale

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Hybrid phase 1T/2H-MoS2 with controllable 1T concentration and its promoted hydrogen evolution reaction.
Nanoscale ( IF 5.8 ) Pub Date : 2020-05-06 , DOI: 10.1039/d0nr02525a
Yuxiao Zhang ₁ , Yasutaka Kuwahara ₂ , Kohsuke Mori ₃ , Catherine Louis ₄ , Hiromi Yamashita ₃

Affiliation

MoS₂ has been investigated as a low-cost alternative to Pt in the electrochemical hydrogen evolution reaction. One of the promising methods to further activate MoS₂ is phase engineering. MoS₂ generally exhibits two kinds of crystalline phases: hexagonal 2H phase and octahedral 1T phase. 1T-MoS₂ exhibits much better chemical/physical properties than natural semiconductor 2H-MoS₂. However, 1T-MoS₂ is metastable and its synthesis is still a challenge. Hybrid 1T/2H-MoS₂ has been synthesized under relatively mild conditions, but controlling the 1T/2H ratio is still an issue which has not been discussed in detail. In this study, the synthesis methods of hybrid phase 1T/2H-MoS₂ with controllable 1T concentration are investigated. The electrochemical hydrogen evolution reaction is then evaluated for 1T/2H-MoS₂ with different 1T concentrations by performing both experiments and theoretical calculations.

中文翻译：

1T浓度可控的混合相1T / 2H-MoS2及其促进的析氢反应。

已经研究了MoS ₂作为电化学制氢反应中Pt的低成本替代品。相工程是进一步激活MoS ₂的有前途的方法之一。MoS ₂通常表现出两种结晶相：六方晶2H相和八面体1T相。1T-MoS ₂表现出比天然半导体2H-MoS ₂更好的化学/物理性质。然而，1T-MoS ₂是亚稳态的，其合成仍然是一个挑战。混合动力1T / 2H-MoS ₂已经在相对温和的条件下合成了β-己内酰胺，但是控制1T / 2H比仍然是一个问题，尚未详细讨论。本研究研究了可控制的1T浓度的混合相1T / 2H-MoS ₂的合成方法。然后通过进行实验和理论计算，对具有不同1T浓度的1T / 2H-MoS ₂进行电化学制氢反应评估。

更新日期：2020-05-06

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